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The hierarchical factor model of ADHD: invariant across age and national groupings?

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Abstract
Objective: To examine the factor structure of attention-deficit/hyperactivity disorder (ADHD) in a clinical sample of 1,373 children and adolescents with ADHD and their 1,772 unselected siblings recruited from different countries across a large age range. Hierarchical and correlated factor analytic models were compared separately in the ADHD and sibling samples, across three different instruments and across parent and teacher informants. Specific consideration was given to factorial invariance analyses across different ages and different countries in the ADHD sample. Method: A sample of children and adolescents between 5 and 17 years of age with ADHD and their unselected siblings was assessed. Participants were recruited from seven European countries and Israel. ADHD symptom data came from a clinical interview with parents Parental Account of Childhood Symptoms and questionnaires from parents and teachers (Conners Parent and Teacher). Results: A hierarchical general factor model with two specific factors best represented the structure of ADHD in both the ADHD and unselected sibling groups, and across informants and instruments. The model was robust and invariant with regard to age differences in the ADHD sample. The model was not strongly invariant across different national groups in the ADHD sample, likely reflecting severity differences across the different centers and not any substantial difference in the clinical presentation of ADHD. Conclusions: The results replicate previous studies of a model with a unitary ADHD component and separable specific traits of inattention and hyperactivity/ impulsivity. The unique contribution of this study was finding support for this model across a large developmental and multinational/ multicultural sample and its invariance across
Keywords
factorial invariance, bifactor model, DEFICIT-HYPERACTIVITY DISORDER, ATTENTION-DEFICIT/HYPERACTIVITY DISORDER, hierarchical models, ADHD, DIAGNOSTIC-APPROACH, OF-FIT INDEXES, UNRELATED DISORDERS, SUBSTANTIAL GENETIC OVERLAP, LARGE MULTICENTER ADHD, DUAL PATHWAY MODEL, INATTENTIVE TYPE, DSM-IV SUBTYPES

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Chicago
Toplak, Maggie E, Geoff B Sorge, David B Flora, Wai Chen, Tobias Banaschewski, Jan Buitelaar, Richard Ebstein, et al. 2012. “The Hierarchical Factor Model of ADHD: Invariant Across Age and National Groupings?” Journal of Child Psychology and Psychiatry 53 (3): 292–303.
APA
Toplak, M. E., Sorge, G. B., Flora, D. B., Chen, W., Banaschewski, T., Buitelaar, J., Ebstein, R., et al. (2012). The hierarchical factor model of ADHD: invariant across age and national groupings? JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY, 53(3), 292–303.
Vancouver
1.
Toplak ME, Sorge GB, Flora DB, Chen W, Banaschewski T, Buitelaar J, et al. The hierarchical factor model of ADHD: invariant across age and national groupings? JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY. 2012;53(3):292–303.
MLA
Toplak, Maggie E, Geoff B Sorge, David B Flora, et al. “The Hierarchical Factor Model of ADHD: Invariant Across Age and National Groupings?” JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY 53.3 (2012): 292–303. Print.
@article{2962796,
  abstract     = {Objective: To examine the factor structure of attention-deficit/hyperactivity disorder (ADHD) in a clinical sample of 1,373 children and adolescents with ADHD and their 1,772 unselected siblings recruited from different countries across a large age range. Hierarchical and correlated factor analytic models were compared separately in the ADHD and sibling samples, across three different instruments and across parent and teacher informants. Specific consideration was given to factorial invariance analyses across different ages and different countries in the ADHD sample. Method: A sample of children and adolescents between 5 and 17 years of age with ADHD and their unselected siblings was assessed. Participants were recruited from seven European countries and Israel. ADHD symptom data came from a clinical interview with parents Parental Account of Childhood Symptoms and questionnaires from parents and teachers (Conners Parent and Teacher). Results: A hierarchical general factor model with two specific factors best represented the structure of ADHD in both the ADHD and unselected sibling groups, and across informants and instruments. The model was robust and invariant with regard to age differences in the ADHD sample. The model was not strongly invariant across different national groups in the ADHD sample, likely reflecting severity differences across the different centers and not any substantial difference in the clinical presentation of ADHD. Conclusions: The results replicate previous studies of a model with a unitary ADHD component and separable specific traits of inattention and hyperactivity/ impulsivity. The unique contribution of this study was finding support for this model across a large developmental and multinational/ multicultural sample and its invariance across},
  author       = {Toplak, Maggie E and Sorge, Geoff B and Flora, David B and Chen, Wai and Banaschewski, Tobias and Buitelaar, Jan and Ebstein, Richard and Eisenberg, Jacques and Franke, Barbara and Gill, Michael and Miranda, Ana and Oades, Robert D and Roeyers, Herbert and Rothenberger, Aribert and Sergeant, Joseph and Barke, Edmund and Steinhausen, Hans-Christoph and Thompson, Margaret and Tannock, Rosemary and Asherson, Philip and Faraone, Stephen V},
  issn         = {0021-9630},
  journal      = {JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY},
  language     = {eng},
  number       = {3},
  pages        = {292--303},
  title        = {The hierarchical factor model of ADHD: invariant across age and national groupings?},
  url          = {http://dx.doi.org/10.1111/j.1469-7610.2011.02500.x},
  volume       = {53},
  year         = {2012},
}

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